Pipette tip rack assembly



FIG. 1 is a top perspective view of a pipette tip rack assembly;

FIG. 2 is a front view thereof;

FIG. 3 is a back view thereof;

FIG. 4 is a side view thereof;

FIG. 5 is a side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof;

FIG. 8 is a bottom perspective view thereof;

FIG. 9 is an enlarged view of area 9 circled in FIG. 7;

FIG. 10 is an enlarged view of area 10 circled in FIG. 7;

FIG. 11 is an enlarged view of area 11 circled in FIG. 7; and,

FIG. 12 is an enlarged view of area 12 circled in FIG. 7.

The broken lines depict portions of the pipette tip rack assembly that form no part of the claimed design. 

CLAIM The ornamental design for a pipette tip rack assembly, as shown and described. 